AMD has begun to phase out its single-core Athlon processor lineup and will launch five new 45W Sempron processors in September to cover the entry-level single-core processor market, according to sources at motherboard makers.

AMD has already stopped taking orders for its 65nm Athlon 64 processors including 3500+, 3800+ and 4000+, while 90nm Athlon 64 processors are still going, but in very low volumes, according to the sources. AMD plans to launch new 65nm 45W Sempron processors in September this year; the models include LE-1300 (2.3GHz/512KB L2), LE-1250 (2.2GHz/512KB L2), LE-1200 (2.1GHz/512KB L2) and LE-1100 (1.9GHz/256KB L2), LE-1150 (2.0GHz/256KB L2), noted the sources.

In addition, AMD will launch Spica core CPUs with support for socket AM2+ and HyperTransport 3.0 for its single-core lineup in the first half of 2008, while in the second half, the company will launch 45nm Sargas core CPUs supporting socket AM3, added the sources.